Mark A. Barnett

Partner, Co-Chair, Business Department - Boston

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Contact Information


617.832.7000 Download vCard

Mark Barnett is co-chair of Foley Hoag’s Energy & Climate Group and the firm’s Business Department. Mark has an extensive business law practice focused on the energy and climate solution sectors, working closely with clients developing innovative technologies and business approaches to solving energy and sustainability challenges, advising emerging and high growth companies in strategic development, financings, acquisitions and industry-specific regulatory matters. Mark also leads the firm’s Energy Project Finance & Development Practice, working with a broad range of developers, project sponsors and investors in this dynamic and growing sector. 

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  • Yale Law School, J.D.
  • Yale University, B.A.

Representative Experience

  • Represented Energetic Insurance, a Managing General Underwriter, in a $7 million Series A financing led by Schneider Electric Ventures, with participation from MS&AD Ventures, Atlantic Global Risk, and MCJ Collective.  
  • Represented leading independent power producer Soltage, LLC in a $250 million partnership with investment management firm Harrison Street to fund solar and other clean energy infrastructure assets developed by Soltage.
  • Represented Soltage, LLC in a $250 million partnership with Harrison Street to fund solar and other clean energy infrastructure assets developed by Soltage.
  • Represented Soltage, LLC in connection with a $140 million equity capital partnership with Basalt Infrastructure Partners LLP and various joint ventures, project acquisitions, tax equity and back leverage financings, and other financing transactions.
  • Advised AEGON USA Realty Advisors (an affiliate of Transamerica) as a tax equity investor in two North Carolina solar portfolios totaling 100 MW and 30 MW respectively.
  • Advised GoldenSet Capital Partners in connection with $50 million sponsor equity and simultaneous tax equity investments for a portfolio of Massachusetts solar projects.
  • Represented SolidEnergy Systems, a breakthrough energy storage technology developer, in connection with its $35 million Series C Financing.
  • Advise Ultra Capital, LLC, a clean infrastructure fund, in fund formation and other financing transactions.
  • Counsel Energetic Insurance, Inc. in its initial $2.5 million financing round.
  • Represent BlueWave Solar on broad range of solar financing and acquisition transactions.
  • Advised Nexamp, Inc. in various financing transactions with Diamond Generating Corp., a wholly owned subsidiary of Mitsubishi Corporation.
  • Advised Altaeros Energies, Inc. on ventures financings led by Softbank Corp.
  • Represented CleanCapital, LLC in negotiation of significant joint ventures with BlackRock’s Renewable Power Group and CarVal Investors to acquire portfolios of operating solar energy projects
  • Advise PRIME Coalition, Inc. on various innovative financing transactions to support early stage breakthrough clean energy technology.
  • Represented True Green Capital Management LLC, an institutional asset manager specializing in distributed power generation with a current focus on distributed commercial PV solar, in the closing of its $113M fund, the True Green Capital Opportunity Partnership, L.P.
  • Advised Sun Catalytix, a leading flow battery developer, on various financings and sale to Lockheed Martin Corporation.
  • Represented Greenwood Energy, in US solar financing activities, including hybrid construction and permanent lending facilities, tax equity financings and back leverage lending facilities
  • Counseled a leading residential energy efficiency provider in its $25 million Series D financing.
  • Represented Strata Solar in a joint venture with Lodestar Energy to develop and finance six solar projects in Massachusetts, including representation in connection with a tax equity financing and a back leverage debt financing.
  • Advise a new venture fund focused on green chemistry for safer consumer products.


  • Ranked by Chambers USA: America's Leading Lawyers for Business as one of Massachusetts' leading Energy & Natural Resources lawyers (2021) 
  • Recognized as a ‘#Solar100 Thought Leader’ by kWh analytics (2018)
  • Listed as one of ‘The Top 100 People Shaping Cleantech on Twitter’ by CleanTechnica (2015) 
  • Listed as a ‘Rising Star’ in Super Lawyers' Massachusetts Rising Stars: A Comprehensive Listing on the Best Young Lawyers in Massachusetts (2009, 2013-2014)


  • Ceres President’s Council, Member
  • PRIME Coalition, Pro Bono Counsel
  • Cleantech Open, Mentor
  • MassChallenge, Mentor
  • New England Clean Energy Council, Policy Committee
  • American Bar Association, Member
  • Ceres Clean Trillion Project, Advisor
  • Brookline Education Foundation, Board Member
  • Boston Bar Associations, Member

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Bar Admissions

  • Massachusetts
  • Connecticut